I worked out a list of ancillary traits you can give characters. Here's an example of what to type: "give_ancillary Henry bard" (without quotes). I can't work out how it works with characters with multiple names, unfortunately, and I've tried everything.

when you have names composed by several words.. like Dietrich von Saxony... they are written as cheats like this Dietrich_von_Saxony.... the idea is that the name must be written exactly as it appears in the game and the spaces ingame must be represented with underlines.....